APPLICATION :'TSC' Fire Dampers are provided on air / gas ducts to control
flow under normal circumstances and to isolate areas connected
by duct from the fire affected area.
CONSTRUCTION :
Dampers are manufactured with single flap / multilouvers.
The louvers are connected through suitable linkage to
a controlling actuating device, such as electrical actuator
/ solenoid valve / pneumatic cylinder / fusible link.
Louver / flap shaft are provided with bearings with greasing
facility to enable smooth rotation.

Louvers / flaps are made of mild steel. The louvers /flaps
are designed in the form of a box and are sandwiched with
high grade insulating material which can withstand 9800 C for period of 90 minutes, conform to UL - 555, thereby
acting as effective barrier in closed position to the
flame path between air duct and fire effected area.

The
shape of the louver / flap is somewhat complex in nature
for multifold purposes :

Z sections are provided at mating surfaces are designed
to create a heavy pressure drop during leakage, because
the air / gas has to take two sharp right angle turns.
This gives a low leakage factor during damper operation.

SEALING EFFICIENCY :

The sealing efficiency of damper Is 98 % approximately
on cross sectional area.